alpha-pH 1000
25
8 AUTO/MANUAL
MODE
Regardless of the mode, you can control devices connected to Relay A or Relay B from the front panel
of this controller. In Automatic mode, the controller’s set point values activate the relays. In Manual
mode, you have manual control of the relays so you can prime the pump or check pump status without
operating the entire system.
8.1
Auto mode (mode after switch-on)
In this mode, the controller set-point values activate the relays. To view the set-point values:
1)
Press the RELAY SELECTION (Rel A/Rel B) key. The upper display shows your set-point value
for Relay A; the lower display shows “SP1”.
2)
After two seconds the upper display shows your set-point value for Relay B; the lower display
shows “SP2”.
3)
After an additional two seconds the controller will return to Measurement mode.
8.2
Manual mode
In this mode, you can manually turn on and off the control devices connected to Relay A or Relay B or
both.
1)
Press the RELAY CONTROL (auto/manu) key. The upper display shows “000”; the lower display
shows “S.Cd” to prompt you to enter the Advanced Set-up code.
2)
Press the
!
or
"
key to scroll the upper display until it reads “22”.
3)
Press the ENTER key. The manual indicator by the RELAY CONTROL key lights up.
Note: Pressing ENTER key at a value other than “22” will cause the controller to revert to Measurement
mode, and the relays will remain in automatic mode.
4)
Press the RELAY SELECTION key to select either Relay A or Relay B. The LED next to the
currently selected relay (A or B) will light.
The manual control options now available will depend on the control type (limit, pulse frequency, or
pulse length) you selected set in section 7.4.2.
-
If you selected Limit control: Upper display reads the current measured value. Lower display
shows “oFF” or “on” depending on the relay status of the currently selected relay.
-
If you selected Pulse length control: Upper display reads the current measured value. Lower
display shows the current pulse duration.
-
If you selected Pulse frequency control: Upper display reads the current measured value. Lower
display shows the current pulse frequency.
5)
Press the
!
or
"
key to change the Relay on/off status, pulse length, or pulse frequency. LED
indicators at the right of controller will change between Red and Green to indicate Relay status.
Note: If you wish to manually change the status of both relays, press the RELAY SELECTION key at
this point and repeat step 5 for the second relay. This first relay will remain under manual control while
you set the second relay.
6)
Press the RELAY CONTROL key to return to Measurement mode. Relays are now back under
automatic control.
